A two treatment trial where two treatments are paired together in adjoining strips is a special case of a "randomized complete block" design. It can be analyzed using a "t test". Following is a "cookbook" approach to analyzing the data from a trial with up to ten double strips, each containing one strip each of the two treatments. The second and third columns are labeled "yield", but any type of data can be analyzed this way.

The difference between the two treatments is given in Cell 3. The number in Cell 8 is called the "t value" (be sure to record it without the negative sign, if Cell 3 us a negative number, that is, if treatment B has a higher yield than treatment A). We assess whether the difference between treatments (Cell 3) is real or whether it's due to random chance using the following test:

Paired Strip Trial Results Graph

Plot Graph